<?php

    /**
     * PHPExcel_Writer_Excel2007_Chart
     * Copyright (c) 2006 - 2015 PHPExcel
     * This library is free software; you can redistribute it and/or
     * modify it under the terms of the GNU Lesser General Public
     * License as published by the Free Software Foundation; either
     * version 2.1 of the License, or (at your option) any later version.
     * This library is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     * Lesser General Public License for more details.
     * You should have received a copy of the GNU Lesser General Public
     * License along with this library; if not, write to the Free Software
     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
     * @category   PHPExcel
     * @package    PHPExcel_Writer_Excel2007
     * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
     * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
     * @version    ##VERSION##, ##DATE##
     */
    class PHPExcel_Writer_Excel2007_Chart extends PHPExcel_Writer_Excel2007_WriterPart {
        protected $calculateCellValues;

        /**
         * Write charts to XML format
         * @param  PHPExcel_Chart $pChart
         * @return  string            XML Output
         * @throws  PHPExcel_Writer_Exception
         */
        public function writeChart(PHPExcel_Chart $pChart = null, $calculateCellValues = true) {
            $this->calculateCellValues = $calculateCellValues;
            // Create XML writer
            $objWriter = null;
            if ($this->getParentWriter()->getUseDiskCaching()) {
                $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
            } else {
                $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
            }
            //    Ensure that data series values are up-to-date before we save
            if ($this->calculateCellValues) {
                $pChart->refresh();
            }
            // XML header
            $objWriter->startDocument('1.0', 'UTF-8', 'yes');
            // c:chartSpace
            $objWriter->startElement('c:chartSpace');
            $objWriter->writeAttribute('xmlns:c', 'http://schemas.openxmlformats.org/drawingml/2006/chart');
            $objWriter->writeAttribute('xmlns:a', 'http://schemas.openxmlformats.org/drawingml/2006/main');
            $objWriter->writeAttribute('xmlns:r', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships');
            $objWriter->startElement('c:date1904');
            $objWriter->writeAttribute('val', 0);
            $objWriter->endElement();
            $objWriter->startElement('c:lang');
            $objWriter->writeAttribute('val', "en-GB");
            $objWriter->endElement();
            $objWriter->startElement('c:roundedCorners');
            $objWriter->writeAttribute('val', 0);
            $objWriter->endElement();
            $this->writeAlternateContent($objWriter);
            $objWriter->startElement('c:chart');
            $this->writeTitle($pChart->getTitle(), $objWriter);
            $objWriter->startElement('c:autoTitleDeleted');
            $objWriter->writeAttribute('val', 0);
            $objWriter->endElement();
            $this->writePlotArea($pChart->getPlotArea(), $pChart->getXAxisLabel(), $pChart->getYAxisLabel(), $objWriter, $pChart->getWorksheet(), $pChart->getChartAxisX(), $pChart->getChartAxisY(), $pChart->getMajorGridlines(), $pChart->getMinorGridlines());
            $this->writeLegend($pChart->getLegend(), $objWriter);
            $objWriter->startElement('c:plotVisOnly');
            $objWriter->writeAttribute('val', 1);
            $objWriter->endElement();
            $objWriter->startElement('c:dispBlanksAs');
            $objWriter->writeAttribute('val', "gap");
            $objWriter->endElement();
            $objWriter->startElement('c:showDLblsOverMax');
            $objWriter->writeAttribute('val', 0);
            $objWriter->endElement();
            $objWriter->endElement();
            $this->writePrintSettings($objWriter);
            $objWriter->endElement();
            // Return
            return $objWriter->getData();
        }

        /**
         * Write Alternate Content block
         * @param  PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @throws  PHPExcel_Writer_Exception
         */
        private function writeAlternateContent($objWriter) {
            $objWriter->startElement('mc:AlternateContent');
            $objWriter->writeAttribute('xmlns:mc', 'http://schemas.openxmlformats.org/markup-compatibility/2006');
            $objWriter->startElement('mc:Choice');
            $objWriter->writeAttribute('xmlns:c14', 'http://schemas.microsoft.com/office/drawing/2007/8/2/chart');
            $objWriter->writeAttribute('Requires', 'c14');
            $objWriter->startElement('c14:style');
            $objWriter->writeAttribute('val', '102');
            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->startElement('mc:Fallback');
            $objWriter->startElement('c:style');
            $objWriter->writeAttribute('val', '2');
            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->endElement();
        }

        /**
         * Write Chart Title
         * @param  PHPExcel_Chart_Title      $title
         * @param  PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @throws  PHPExcel_Writer_Exception
         */
        private function writeTitle(PHPExcel_Chart_Title $title = null, $objWriter) {
            if (is_null($title)) {
                return;
            }
            $objWriter->startElement('c:title');
            $objWriter->startElement('c:tx');
            $objWriter->startElement('c:rich');
            $objWriter->startElement('a:bodyPr');
            $objWriter->endElement();
            $objWriter->startElement('a:lstStyle');
            $objWriter->endElement();
            $objWriter->startElement('a:p');
            $caption = $title->getCaption();
            if ((is_array($caption)) && (count($caption) > 0)) {
                $caption = $caption[0];
            }
            $this->getParentWriter()->getWriterPart('stringtable')->writeRichTextForCharts($objWriter, $caption, 'a');
            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->endElement();
            $this->writeLayout($title->getLayout(), $objWriter);
            $objWriter->startElement('c:overlay');
            $objWriter->writeAttribute('val', 0);
            $objWriter->endElement();
            $objWriter->endElement();
        }

        /**
         * Write Layout
         * @param  PHPExcel_Chart_Layout     $layout
         * @param  PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @throws  PHPExcel_Writer_Exception
         */
        private function writeLayout(PHPExcel_Chart_Layout $layout = null, $objWriter) {
            $objWriter->startElement('c:layout');
            if (!is_null($layout)) {
                $objWriter->startElement('c:manualLayout');
                $layoutTarget = $layout->getLayoutTarget();
                if (!is_null($layoutTarget)) {
                    $objWriter->startElement('c:layoutTarget');
                    $objWriter->writeAttribute('val', $layoutTarget);
                    $objWriter->endElement();
                }
                $xMode = $layout->getXMode();
                if (!is_null($xMode)) {
                    $objWriter->startElement('c:xMode');
                    $objWriter->writeAttribute('val', $xMode);
                    $objWriter->endElement();
                }
                $yMode = $layout->getYMode();
                if (!is_null($yMode)) {
                    $objWriter->startElement('c:yMode');
                    $objWriter->writeAttribute('val', $yMode);
                    $objWriter->endElement();
                }
                $x = $layout->getXPosition();
                if (!is_null($x)) {
                    $objWriter->startElement('c:x');
                    $objWriter->writeAttribute('val', $x);
                    $objWriter->endElement();
                }
                $y = $layout->getYPosition();
                if (!is_null($y)) {
                    $objWriter->startElement('c:y');
                    $objWriter->writeAttribute('val', $y);
                    $objWriter->endElement();
                }
                $w = $layout->getWidth();
                if (!is_null($w)) {
                    $objWriter->startElement('c:w');
                    $objWriter->writeAttribute('val', $w);
                    $objWriter->endElement();
                }
                $h = $layout->getHeight();
                if (!is_null($h)) {
                    $objWriter->startElement('c:h');
                    $objWriter->writeAttribute('val', $h);
                    $objWriter->endElement();
                }
                $objWriter->endElement();
            }
            $objWriter->endElement();
        }

        /**
         * Write Chart Plot Area
         * @param  PHPExcel_Chart_PlotArea   $plotArea
         * @param  PHPExcel_Chart_Title      $xAxisLabel
         * @param  PHPExcel_Chart_Title      $yAxisLabel
         * @param  PHPExcel_Chart_Axis       $xAxis
         * @param  PHPExcel_Chart_Axis       $yAxis
         * @param  PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @throws  PHPExcel_Writer_Exception
         */
        private function writePlotArea(PHPExcel_Chart_PlotArea $plotArea, PHPExcel_Chart_Title $xAxisLabel = null, PHPExcel_Chart_Title $yAxisLabel = null, $objWriter, PHPExcel_Worksheet $pSheet, PHPExcel_Chart_Axis $xAxis, PHPExcel_Chart_Axis $yAxis, PHPExcel_Chart_GridLines $majorGridlines, PHPExcel_Chart_GridLines $minorGridlines) {
            if (is_null($plotArea)) {
                return;
            }
            $id1                = $id2 = 0;
            $this->_seriesIndex = 0;
            $objWriter->startElement('c:plotArea');
            $layout = $plotArea->getLayout();
            $this->writeLayout($layout, $objWriter);
            $chartTypes            = self::getChartType($plotArea);
            $catIsMultiLevelSeries = $valIsMultiLevelSeries = false;
            $plotGroupingType      = '';
            foreach ($chartTypes as $chartType) {
                $objWriter->startElement('c:' . $chartType);
                $groupCount = $plotArea->getPlotGroupCount();
                for ($i = 0; $i < $groupCount; ++$i) {
                    $plotGroup = $plotArea->getPlotGroupByIndex($i);
                    $groupType = $plotGroup->getPlotType();
                    if ($groupType == $chartType) {
                        $plotStyle = $plotGroup->getPlotStyle();
                        if ($groupType === PHPExcel_Chart_DataSeries::TYPE_RADARCHART) {
                            $objWriter->startElement('c:radarStyle');
                            $objWriter->writeAttribute('val', $plotStyle);
                            $objWriter->endElement();
                        } elseif ($groupType === PHPExcel_Chart_DataSeries::TYPE_SCATTERCHART) {
                            $objWriter->startElement('c:scatterStyle');
                            $objWriter->writeAttribute('val', $plotStyle);
                            $objWriter->endElement();
                        }
                        $this->writePlotGroup($plotGroup, $chartType, $objWriter, $catIsMultiLevelSeries, $valIsMultiLevelSeries, $plotGroupingType, $pSheet);
                    }
                }
                $this->writeDataLabels($objWriter, $layout);
                if ($chartType === PHPExcel_Chart_DataSeries::TYPE_LINECHART) {
                    //    Line only, Line3D can't be smoothed
                    $objWriter->startElement('c:smooth');
                    $objWriter->writeAttribute('val', (integer)$plotGroup->getSmoothLine());
                    $objWriter->endElement();
                } elseif (($chartType === PHPExcel_Chart_DataSeries::TYPE_BARCHART) || ($chartType === PHPExcel_Chart_DataSeries::TYPE_BARCHART_3D)) {
                    $objWriter->startElement('c:gapWidth');
                    $objWriter->writeAttribute('val', 150);
                    $objWriter->endElement();
                    if ($plotGroupingType == 'percentStacked' || $plotGroupingType == 'stacked') {
                        $objWriter->startElement('c:overlap');
                        $objWriter->writeAttribute('val', 100);
                        $objWriter->endElement();
                    }
                } elseif ($chartType === PHPExcel_Chart_DataSeries::TYPE_BUBBLECHART) {
                    $objWriter->startElement('c:bubbleScale');
                    $objWriter->writeAttribute('val', 25);
                    $objWriter->endElement();
                    $objWriter->startElement('c:showNegBubbles');
                    $objWriter->writeAttribute('val', 0);
                    $objWriter->endElement();
                } elseif ($chartType === PHPExcel_Chart_DataSeries::TYPE_STOCKCHART) {
                    $objWriter->startElement('c:hiLowLines');
                    $objWriter->endElement();
                    $objWriter->startElement('c:upDownBars');
                    $objWriter->startElement('c:gapWidth');
                    $objWriter->writeAttribute('val', 300);
                    $objWriter->endElement();
                    $objWriter->startElement('c:upBars');
                    $objWriter->endElement();
                    $objWriter->startElement('c:downBars');
                    $objWriter->endElement();
                    $objWriter->endElement();
                }
                //    Generate 2 unique numbers to use for axId values
                //                    $id1 = $id2 = rand(10000000,99999999);
                //                    do {
                //                        $id2 = rand(10000000,99999999);
                //                    } while ($id1 == $id2);
                $id1 = '75091328';
                $id2 = '75089408';
                if (($chartType !== PHPExcel_Chart_DataSeries::TYPE_PIECHART) && ($chartType !== PHPExcel_Chart_DataSeries::TYPE_PIECHART_3D) && ($chartType !== PHPExcel_Chart_DataSeries::TYPE_DONUTCHART)) {
                    $objWriter->startElement('c:axId');
                    $objWriter->writeAttribute('val', $id1);
                    $objWriter->endElement();
                    $objWriter->startElement('c:axId');
                    $objWriter->writeAttribute('val', $id2);
                    $objWriter->endElement();
                } else {
                    $objWriter->startElement('c:firstSliceAng');
                    $objWriter->writeAttribute('val', 0);
                    $objWriter->endElement();
                    if ($chartType === PHPExcel_Chart_DataSeries::TYPE_DONUTCHART) {
                        $objWriter->startElement('c:holeSize');
                        $objWriter->writeAttribute('val', 50);
                        $objWriter->endElement();
                    }
                }
                $objWriter->endElement();
            }
            if (($chartType !== PHPExcel_Chart_DataSeries::TYPE_PIECHART) && ($chartType !== PHPExcel_Chart_DataSeries::TYPE_PIECHART_3D) && ($chartType !== PHPExcel_Chart_DataSeries::TYPE_DONUTCHART)) {
                if ($chartType === PHPExcel_Chart_DataSeries::TYPE_BUBBLECHART) {
                    $this->writeValueAxis($objWriter, $plotArea, $xAxisLabel, $chartType, $id1, $id2, $catIsMultiLevelSeries, $xAxis, $yAxis, $majorGridlines, $minorGridlines);
                } else {
                    $this->writeCategoryAxis($objWriter, $plotArea, $xAxisLabel, $chartType, $id1, $id2, $catIsMultiLevelSeries, $xAxis, $yAxis);
                }
                $this->writeValueAxis($objWriter, $plotArea, $yAxisLabel, $chartType, $id1, $id2, $valIsMultiLevelSeries, $xAxis, $yAxis, $majorGridlines, $minorGridlines);
            }
            $objWriter->endElement();
        }

        /**
         * Get the data series type(s) for a chart plot series
         * @param  PHPExcel_Chart_PlotArea $plotArea
         * @return  string|array
         * @throws  PHPExcel_Writer_Exception
         */
        private static function getChartType($plotArea) {
            $groupCount = $plotArea->getPlotGroupCount();
            if ($groupCount == 1) {
                $chartType = [$plotArea->getPlotGroupByIndex(0)->getPlotType()];
            } else {
                $chartTypes = [];
                for ($i = 0; $i < $groupCount; ++$i) {
                    $chartTypes[] = $plotArea->getPlotGroupByIndex($i)->getPlotType();
                }
                $chartType = array_unique($chartTypes);
                if (count($chartTypes) == 0) {
                    throw new PHPExcel_Writer_Exception('Chart is not yet implemented');
                }
            }
            return $chartType;
        }

        /**
         * Write Plot Group (series of related plots)
         * @param  PHPExcel_Chart_DataSeries $plotGroup
         * @param  string                    $groupType              Type of plot for dataseries
         * @param  PHPExcel_Shared_XMLWriter $objWriter              XML Writer
         * @param  boolean                   &$catIsMultiLevelSeries Is category a multi-series category
         * @param  boolean                   &$valIsMultiLevelSeries Is value set a multi-series set
         * @param  string                    &$plotGroupingType      Type of grouping for multi-series values
         * @param  PHPExcel_Worksheet        $pSheet
         * @throws  PHPExcel_Writer_Exception
         */
        private function writePlotGroup($plotGroup, $groupType, $objWriter, &$catIsMultiLevelSeries, &$valIsMultiLevelSeries, &$plotGroupingType, PHPExcel_Worksheet $pSheet) {
            if (is_null($plotGroup)) {
                return;
            }
            if (($groupType == PHPExcel_Chart_DataSeries::TYPE_BARCHART) || ($groupType == PHPExcel_Chart_DataSeries::TYPE_BARCHART_3D)) {
                $objWriter->startElement('c:barDir');
                $objWriter->writeAttribute('val', $plotGroup->getPlotDirection());
                $objWriter->endElement();
            }
            if (!is_null($plotGroup->getPlotGrouping())) {
                $plotGroupingType = $plotGroup->getPlotGrouping();
                $objWriter->startElement('c:grouping');
                $objWriter->writeAttribute('val', $plotGroupingType);
                $objWriter->endElement();
            }
            //    Get these details before the loop, because we can use the count to check for varyColors
            $plotSeriesOrder = $plotGroup->getPlotOrder();
            $plotSeriesCount = count($plotSeriesOrder);
            if (($groupType !== PHPExcel_Chart_DataSeries::TYPE_RADARCHART) && ($groupType !== PHPExcel_Chart_DataSeries::TYPE_STOCKCHART)) {
                if ($groupType !== PHPExcel_Chart_DataSeries::TYPE_LINECHART) {
                    if (($groupType == PHPExcel_Chart_DataSeries::TYPE_PIECHART) || ($groupType == PHPExcel_Chart_DataSeries::TYPE_PIECHART_3D) || ($groupType == PHPExcel_Chart_DataSeries::TYPE_DONUTCHART) || ($plotSeriesCount > 1)) {
                        $objWriter->startElement('c:varyColors');
                        $objWriter->writeAttribute('val', 1);
                        $objWriter->endElement();
                    } else {
                        $objWriter->startElement('c:varyColors');
                        $objWriter->writeAttribute('val', 0);
                        $objWriter->endElement();
                    }
                }
            }
            foreach ($plotSeriesOrder as $plotSeriesIdx => $plotSeriesRef) {
                $objWriter->startElement('c:ser');
                $objWriter->startElement('c:idx');
                $objWriter->writeAttribute('val', $this->_seriesIndex + $plotSeriesIdx);
                $objWriter->endElement();
                $objWriter->startElement('c:order');
                $objWriter->writeAttribute('val', $this->_seriesIndex + $plotSeriesRef);
                $objWriter->endElement();
                if (($groupType == PHPExcel_Chart_DataSeries::TYPE_PIECHART) || ($groupType == PHPExcel_Chart_DataSeries::TYPE_PIECHART_3D) || ($groupType == PHPExcel_Chart_DataSeries::TYPE_DONUTCHART)) {
                    $objWriter->startElement('c:dPt');
                    $objWriter->startElement('c:idx');
                    $objWriter->writeAttribute('val', 3);
                    $objWriter->endElement();
                    $objWriter->startElement('c:bubble3D');
                    $objWriter->writeAttribute('val', 0);
                    $objWriter->endElement();
                    $objWriter->startElement('c:spPr');
                    $objWriter->startElement('a:solidFill');
                    $objWriter->startElement('a:srgbClr');
                    $objWriter->writeAttribute('val', 'FF9900');
                    $objWriter->endElement();
                    $objWriter->endElement();
                    $objWriter->endElement();
                    $objWriter->endElement();
                }
                //    Labels
                $plotSeriesLabel = $plotGroup->getPlotLabelByIndex($plotSeriesRef);
                if ($plotSeriesLabel && ($plotSeriesLabel->getPointCount() > 0)) {
                    $objWriter->startElement('c:tx');
                    $objWriter->startElement('c:strRef');
                    $this->writePlotSeriesLabel($plotSeriesLabel, $objWriter);
                    $objWriter->endElement();
                    $objWriter->endElement();
                }
                //    Formatting for the points
                if (($groupType == PHPExcel_Chart_DataSeries::TYPE_LINECHART) || ($groupType == PHPExcel_Chart_DataSeries::TYPE_STOCKCHART)) {
                    $objWriter->startElement('c:spPr');
                    $objWriter->startElement('a:ln');
                    $objWriter->writeAttribute('w', 12700);
                    if ($groupType == PHPExcel_Chart_DataSeries::TYPE_STOCKCHART) {
                        $objWriter->startElement('a:noFill');
                        $objWriter->endElement();
                    }
                    $objWriter->endElement();
                    $objWriter->endElement();
                }
                $plotSeriesValues = $plotGroup->getPlotValuesByIndex($plotSeriesRef);
                if ($plotSeriesValues) {
                    $plotSeriesMarker = $plotSeriesValues->getPointMarker();
                    if ($plotSeriesMarker) {
                        $objWriter->startElement('c:marker');
                        $objWriter->startElement('c:symbol');
                        $objWriter->writeAttribute('val', $plotSeriesMarker);
                        $objWriter->endElement();
                        if ($plotSeriesMarker !== 'none') {
                            $objWriter->startElement('c:size');
                            $objWriter->writeAttribute('val', 3);
                            $objWriter->endElement();
                        }
                        $objWriter->endElement();
                    }
                }
                if (($groupType === PHPExcel_Chart_DataSeries::TYPE_BARCHART) || ($groupType === PHPExcel_Chart_DataSeries::TYPE_BARCHART_3D) || ($groupType === PHPExcel_Chart_DataSeries::TYPE_BUBBLECHART)) {
                    $objWriter->startElement('c:invertIfNegative');
                    $objWriter->writeAttribute('val', 0);
                    $objWriter->endElement();
                }
                //    Category Labels
                $plotSeriesCategory = $plotGroup->getPlotCategoryByIndex($plotSeriesRef);
                if ($plotSeriesCategory && ($plotSeriesCategory->getPointCount() > 0)) {
                    $catIsMultiLevelSeries = $catIsMultiLevelSeries || $plotSeriesCategory->isMultiLevelSeries();
                    if (($groupType == PHPExcel_Chart_DataSeries::TYPE_PIECHART) || ($groupType == PHPExcel_Chart_DataSeries::TYPE_PIECHART_3D) || ($groupType == PHPExcel_Chart_DataSeries::TYPE_DONUTCHART)) {
                        if (!is_null($plotGroup->getPlotStyle())) {
                            $plotStyle = $plotGroup->getPlotStyle();
                            if ($plotStyle) {
                                $objWriter->startElement('c:explosion');
                                $objWriter->writeAttribute('val', 25);
                                $objWriter->endElement();
                            }
                        }
                    }
                    if (($groupType === PHPExcel_Chart_DataSeries::TYPE_BUBBLECHART) || ($groupType === PHPExcel_Chart_DataSeries::TYPE_SCATTERCHART)) {
                        $objWriter->startElement('c:xVal');
                    } else {
                        $objWriter->startElement('c:cat');
                    }
                    $this->writePlotSeriesValues($plotSeriesCategory, $objWriter, $groupType, 'str', $pSheet);
                    $objWriter->endElement();
                }
                //    Values
                if ($plotSeriesValues) {
                    $valIsMultiLevelSeries = $valIsMultiLevelSeries || $plotSeriesValues->isMultiLevelSeries();
                    if (($groupType === PHPExcel_Chart_DataSeries::TYPE_BUBBLECHART) || ($groupType === PHPExcel_Chart_DataSeries::TYPE_SCATTERCHART)) {
                        $objWriter->startElement('c:yVal');
                    } else {
                        $objWriter->startElement('c:val');
                    }
                    $this->writePlotSeriesValues($plotSeriesValues, $objWriter, $groupType, 'num', $pSheet);
                    $objWriter->endElement();
                }
                if ($groupType === PHPExcel_Chart_DataSeries::TYPE_BUBBLECHART) {
                    $this->writeBubbles($plotSeriesValues, $objWriter, $pSheet);
                }
                $objWriter->endElement();
            }
            $this->_seriesIndex += $plotSeriesIdx + 1;
        }

        /**
         * Write Plot Series Label
         * @param  PHPExcel_Chart_DataSeriesValues $plotSeriesLabel
         * @param  PHPExcel_Shared_XMLWriter       $objWriter XML Writer
         * @throws  PHPExcel_Writer_Exception
         */
        private function writePlotSeriesLabel($plotSeriesLabel, $objWriter) {
            if (is_null($plotSeriesLabel)) {
                return;
            }
            $objWriter->startElement('c:f');
            $objWriter->writeRawData($plotSeriesLabel->getDataSource());
            $objWriter->endElement();
            $objWriter->startElement('c:strCache');
            $objWriter->startElement('c:ptCount');
            $objWriter->writeAttribute('val', $plotSeriesLabel->getPointCount());
            $objWriter->endElement();
            foreach ($plotSeriesLabel->getDataValues() as $plotLabelKey => $plotLabelValue) {
                $objWriter->startElement('c:pt');
                $objWriter->writeAttribute('idx', $plotLabelKey);
                $objWriter->startElement('c:v');
                $objWriter->writeRawData($plotLabelValue);
                $objWriter->endElement();
                $objWriter->endElement();
            }
            $objWriter->endElement();
        }

        /**
         * Write Plot Series Values
         * @param  PHPExcel_Chart_DataSeriesValues $plotSeriesValues
         * @param  PHPExcel_Shared_XMLWriter       $objWriter XML Writer
         * @param  string                          $groupType Type of plot for dataseries
         * @param  string                          $dataType  Datatype of series values
         * @param  PHPExcel_Worksheet              $pSheet
         * @throws  PHPExcel_Writer_Exception
         */
        private function writePlotSeriesValues($plotSeriesValues, $objWriter, $groupType, $dataType = 'str', PHPExcel_Worksheet $pSheet) {
            if (is_null($plotSeriesValues)) {
                return;
            }
            if ($plotSeriesValues->isMultiLevelSeries()) {
                $levelCount = $plotSeriesValues->multiLevelCount();
                $objWriter->startElement('c:multiLvlStrRef');
                $objWriter->startElement('c:f');
                $objWriter->writeRawData($plotSeriesValues->getDataSource());
                $objWriter->endElement();
                $objWriter->startElement('c:multiLvlStrCache');
                $objWriter->startElement('c:ptCount');
                $objWriter->writeAttribute('val', $plotSeriesValues->getPointCount());
                $objWriter->endElement();
                for ($level = 0; $level < $levelCount; ++$level) {
                    $objWriter->startElement('c:lvl');
                    foreach ($plotSeriesValues->getDataValues() as $plotSeriesKey => $plotSeriesValue) {
                        if (isset($plotSeriesValue[$level])) {
                            $objWriter->startElement('c:pt');
                            $objWriter->writeAttribute('idx', $plotSeriesKey);
                            $objWriter->startElement('c:v');
                            $objWriter->writeRawData($plotSeriesValue[$level]);
                            $objWriter->endElement();
                            $objWriter->endElement();
                        }
                    }
                    $objWriter->endElement();
                }
                $objWriter->endElement();
                $objWriter->endElement();
            } else {
                $objWriter->startElement('c:' . $dataType . 'Ref');
                $objWriter->startElement('c:f');
                $objWriter->writeRawData($plotSeriesValues->getDataSource());
                $objWriter->endElement();
                $objWriter->startElement('c:' . $dataType . 'Cache');
                if (($groupType != PHPExcel_Chart_DataSeries::TYPE_PIECHART) && ($groupType != PHPExcel_Chart_DataSeries::TYPE_PIECHART_3D) && ($groupType != PHPExcel_Chart_DataSeries::TYPE_DONUTCHART)) {
                    if (($plotSeriesValues->getFormatCode() !== null) && ($plotSeriesValues->getFormatCode() !== '')) {
                        $objWriter->startElement('c:formatCode');
                        $objWriter->writeRawData($plotSeriesValues->getFormatCode());
                        $objWriter->endElement();
                    }
                }
                $objWriter->startElement('c:ptCount');
                $objWriter->writeAttribute('val', $plotSeriesValues->getPointCount());
                $objWriter->endElement();
                $dataValues = $plotSeriesValues->getDataValues();
                if (!empty($dataValues)) {
                    if (is_array($dataValues)) {
                        foreach ($dataValues as $plotSeriesKey => $plotSeriesValue) {
                            $objWriter->startElement('c:pt');
                            $objWriter->writeAttribute('idx', $plotSeriesKey);
                            $objWriter->startElement('c:v');
                            $objWriter->writeRawData($plotSeriesValue);
                            $objWriter->endElement();
                            $objWriter->endElement();
                        }
                    }
                }
                $objWriter->endElement();
                $objWriter->endElement();
            }
        }

        /**
         * Write Bubble Chart Details
         * @param  PHPExcel_Chart_DataSeriesValues $plotSeriesValues
         * @param  PHPExcel_Shared_XMLWriter       $objWriter XML Writer
         * @throws  PHPExcel_Writer_Exception
         */
        private function writeBubbles($plotSeriesValues, $objWriter, PHPExcel_Worksheet $pSheet) {
            if (is_null($plotSeriesValues)) {
                return;
            }
            $objWriter->startElement('c:bubbleSize');
            $objWriter->startElement('c:numLit');
            $objWriter->startElement('c:formatCode');
            $objWriter->writeRawData('General');
            $objWriter->endElement();
            $objWriter->startElement('c:ptCount');
            $objWriter->writeAttribute('val', $plotSeriesValues->getPointCount());
            $objWriter->endElement();
            $dataValues = $plotSeriesValues->getDataValues();
            if (!empty($dataValues)) {
                if (is_array($dataValues)) {
                    foreach ($dataValues as $plotSeriesKey => $plotSeriesValue) {
                        $objWriter->startElement('c:pt');
                        $objWriter->writeAttribute('idx', $plotSeriesKey);
                        $objWriter->startElement('c:v');
                        $objWriter->writeRawData(1);
                        $objWriter->endElement();
                        $objWriter->endElement();
                    }
                }
            }
            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->startElement('c:bubble3D');
            $objWriter->writeAttribute('val', 0);
            $objWriter->endElement();
        }

        /**
         * Write Data Labels
         * @param  PHPExcel_Shared_XMLWriter $objWriter   XML Writer
         * @param  PHPExcel_Chart_Layout     $chartLayout Chart layout
         * @throws  PHPExcel_Writer_Exception
         */
        private function writeDataLabels($objWriter, $chartLayout) {
            $objWriter->startElement('c:dLbls');
            $objWriter->startElement('c:showLegendKey');
            $showLegendKey = (empty($chartLayout)) ? 0 : $chartLayout->getShowLegendKey();
            $objWriter->writeAttribute('val', ((empty($showLegendKey)) ? 0 : 1));
            $objWriter->endElement();
            $objWriter->startElement('c:showVal');
            $showVal = (empty($chartLayout)) ? 0 : $chartLayout->getShowVal();
            $objWriter->writeAttribute('val', ((empty($showVal)) ? 0 : 1));
            $objWriter->endElement();
            $objWriter->startElement('c:showCatName');
            $showCatName = (empty($chartLayout)) ? 0 : $chartLayout->getShowCatName();
            $objWriter->writeAttribute('val', ((empty($showCatName)) ? 0 : 1));
            $objWriter->endElement();
            $objWriter->startElement('c:showSerName');
            $showSerName = (empty($chartLayout)) ? 0 : $chartLayout->getShowSerName();
            $objWriter->writeAttribute('val', ((empty($showSerName)) ? 0 : 1));
            $objWriter->endElement();
            $objWriter->startElement('c:showPercent');
            $showPercent = (empty($chartLayout)) ? 0 : $chartLayout->getShowPercent();
            $objWriter->writeAttribute('val', ((empty($showPercent)) ? 0 : 1));
            $objWriter->endElement();
            $objWriter->startElement('c:showBubbleSize');
            $showBubbleSize = (empty($chartLayout)) ? 0 : $chartLayout->getShowBubbleSize();
            $objWriter->writeAttribute('val', ((empty($showBubbleSize)) ? 0 : 1));
            $objWriter->endElement();
            $objWriter->startElement('c:showLeaderLines');
            $showLeaderLines = (empty($chartLayout)) ? 1 : $chartLayout->getShowLeaderLines();
            $objWriter->writeAttribute('val', ((empty($showLeaderLines)) ? 0 : 1));
            $objWriter->endElement();
            $objWriter->endElement();
        }

        /**
         * Write Value Axis
         * @param  PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param  PHPExcel_Chart_PlotArea   $plotArea
         * @param  PHPExcel_Chart_Title      $yAxisLabel
         * @param  string                    $groupType Chart type
         * @param  string                    $id1
         * @param  string                    $id2
         * @param  boolean                   $isMultiLevelSeries
         * @throws  PHPExcel_Writer_Exception
         */
        private function writeValueAxis($objWriter, PHPExcel_Chart_PlotArea $plotArea, $yAxisLabel, $groupType, $id1, $id2, $isMultiLevelSeries, $xAxis, $yAxis, $majorGridlines, $minorGridlines) {
            $objWriter->startElement('c:valAx');
            if ($id2 > 0) {
                $objWriter->startElement('c:axId');
                $objWriter->writeAttribute('val', $id2);
                $objWriter->endElement();
            }
            $objWriter->startElement('c:scaling');
            if (!is_null($xAxis->getAxisOptionsProperty('maximum'))) {
                $objWriter->startElement('c:max');
                $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('maximum'));
                $objWriter->endElement();
            }
            if (!is_null($xAxis->getAxisOptionsProperty('minimum'))) {
                $objWriter->startElement('c:min');
                $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('minimum'));
                $objWriter->endElement();
            }
            $objWriter->startElement('c:orientation');
            $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('orientation'));
            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->startElement('c:delete');
            $objWriter->writeAttribute('val', 0);
            $objWriter->endElement();
            $objWriter->startElement('c:axPos');
            $objWriter->writeAttribute('val', "l");
            $objWriter->endElement();
            $objWriter->startElement('c:majorGridlines');
            $objWriter->startElement('c:spPr');
            if (!is_null($majorGridlines->getLineColorProperty('value'))) {
                $objWriter->startElement('a:ln');
                $objWriter->writeAttribute('w', $majorGridlines->getLineStyleProperty('width'));
                $objWriter->startElement('a:solidFill');
                $objWriter->startElement("a:{$majorGridlines->getLineColorProperty('type')}");
                $objWriter->writeAttribute('val', $majorGridlines->getLineColorProperty('value'));
                $objWriter->startElement('a:alpha');
                $objWriter->writeAttribute('val', $majorGridlines->getLineColorProperty('alpha'));
                $objWriter->endElement(); //end alpha
                $objWriter->endElement(); //end srgbClr
                $objWriter->endElement(); //end solidFill
                $objWriter->startElement('a:prstDash');
                $objWriter->writeAttribute('val', $majorGridlines->getLineStyleProperty('dash'));
                $objWriter->endElement();
                if ($majorGridlines->getLineStyleProperty('join') == 'miter') {
                    $objWriter->startElement('a:miter');
                    $objWriter->writeAttribute('lim', '800000');
                    $objWriter->endElement();
                } else {
                    $objWriter->startElement('a:bevel');
                    $objWriter->endElement();
                }
                if (!is_null($majorGridlines->getLineStyleProperty([
                                                                       'arrow',
                                                                       'head',
                                                                       'type'
                                                                   ]
                )
                )
                ) {
                    $objWriter->startElement('a:headEnd');
                    $objWriter->writeAttribute('type', $majorGridlines->getLineStyleProperty([
                                                                                                 'arrow',
                                                                                                 'head',
                                                                                                 'type'
                                                                                             ]
                    )
                    );
                    $objWriter->writeAttribute('w', $majorGridlines->getLineStyleArrowParameters('head', 'w'));
                    $objWriter->writeAttribute('len', $majorGridlines->getLineStyleArrowParameters('head', 'len'));
                    $objWriter->endElement();
                }
                if (!is_null($majorGridlines->getLineStyleProperty([
                                                                       'arrow',
                                                                       'end',
                                                                       'type'
                                                                   ]
                )
                )
                ) {
                    $objWriter->startElement('a:tailEnd');
                    $objWriter->writeAttribute('type', $majorGridlines->getLineStyleProperty([
                                                                                                 'arrow',
                                                                                                 'end',
                                                                                                 'type'
                                                                                             ]
                    )
                    );
                    $objWriter->writeAttribute('w', $majorGridlines->getLineStyleArrowParameters('end', 'w'));
                    $objWriter->writeAttribute('len', $majorGridlines->getLineStyleArrowParameters('end', 'len'));
                    $objWriter->endElement();
                }
                $objWriter->endElement(); //end ln
            }
            $objWriter->startElement('a:effectLst');
            if (!is_null($majorGridlines->getGlowSize())) {
                $objWriter->startElement('a:glow');
                $objWriter->writeAttribute('rad', $majorGridlines->getGlowSize());
                $objWriter->startElement("a:{$majorGridlines->getGlowColor('type')}");
                $objWriter->writeAttribute('val', $majorGridlines->getGlowColor('value'));
                $objWriter->startElement('a:alpha');
                $objWriter->writeAttribute('val', $majorGridlines->getGlowColor('alpha'));
                $objWriter->endElement(); //end alpha
                $objWriter->endElement(); //end schemeClr
                $objWriter->endElement(); //end glow
            }
            if (!is_null($majorGridlines->getShadowProperty('presets'))) {
                $objWriter->startElement("a:{$majorGridlines->getShadowProperty('effect')}");
                if (!is_null($majorGridlines->getShadowProperty('blur'))) {
                    $objWriter->writeAttribute('blurRad', $majorGridlines->getShadowProperty('blur'));
                }
                if (!is_null($majorGridlines->getShadowProperty('distance'))) {
                    $objWriter->writeAttribute('dist', $majorGridlines->getShadowProperty('distance'));
                }
                if (!is_null($majorGridlines->getShadowProperty('direction'))) {
                    $objWriter->writeAttribute('dir', $majorGridlines->getShadowProperty('direction'));
                }
                if (!is_null($majorGridlines->getShadowProperty('algn'))) {
                    $objWriter->writeAttribute('algn', $majorGridlines->getShadowProperty('algn'));
                }
                if (!is_null($majorGridlines->getShadowProperty([
                                                                    'size',
                                                                    'sx'
                                                                ]
                )
                )
                ) {
                    $objWriter->writeAttribute('sx', $majorGridlines->getShadowProperty([
                                                                                            'size',
                                                                                            'sx'
                                                                                        ]
                    )
                    );
                }
                if (!is_null($majorGridlines->getShadowProperty([
                                                                    'size',
                                                                    'sy'
                                                                ]
                )
                )
                ) {
                    $objWriter->writeAttribute('sy', $majorGridlines->getShadowProperty([
                                                                                            'size',
                                                                                            'sy'
                                                                                        ]
                    )
                    );
                }
                if (!is_null($majorGridlines->getShadowProperty([
                                                                    'size',
                                                                    'kx'
                                                                ]
                )
                )
                ) {
                    $objWriter->writeAttribute('kx', $majorGridlines->getShadowProperty([
                                                                                            'size',
                                                                                            'kx'
                                                                                        ]
                    )
                    );
                }
                if (!is_null($majorGridlines->getShadowProperty('rotWithShape'))) {
                    $objWriter->writeAttribute('rotWithShape', $majorGridlines->getShadowProperty('rotWithShape'));
                }
                $objWriter->startElement("a:{$majorGridlines->getShadowProperty(['color', 'type'])}");
                $objWriter->writeAttribute('val', $majorGridlines->getShadowProperty([
                                                                                         'color',
                                                                                         'value'
                                                                                     ]
                )
                );
                $objWriter->startElement('a:alpha');
                $objWriter->writeAttribute('val', $majorGridlines->getShadowProperty([
                                                                                         'color',
                                                                                         'alpha'
                                                                                     ]
                )
                );
                $objWriter->endElement(); //end alpha
                $objWriter->endElement(); //end color:type
                $objWriter->endElement(); //end shadow
            }
            if (!is_null($majorGridlines->getSoftEdgesSize())) {
                $objWriter->startElement('a:softEdge');
                $objWriter->writeAttribute('rad', $majorGridlines->getSoftEdgesSize());
                $objWriter->endElement(); //end softEdge
            }
            $objWriter->endElement(); //end effectLst
            $objWriter->endElement(); //end spPr
            $objWriter->endElement(); //end majorGridLines
            if ($minorGridlines->getObjectState()) {
                $objWriter->startElement('c:minorGridlines');
                $objWriter->startElement('c:spPr');
                if (!is_null($minorGridlines->getLineColorProperty('value'))) {
                    $objWriter->startElement('a:ln');
                    $objWriter->writeAttribute('w', $minorGridlines->getLineStyleProperty('width'));
                    $objWriter->startElement('a:solidFill');
                    $objWriter->startElement("a:{$minorGridlines->getLineColorProperty('type')}");
                    $objWriter->writeAttribute('val', $minorGridlines->getLineColorProperty('value'));
                    $objWriter->startElement('a:alpha');
                    $objWriter->writeAttribute('val', $minorGridlines->getLineColorProperty('alpha'));
                    $objWriter->endElement(); //end alpha
                    $objWriter->endElement(); //end srgbClr
                    $objWriter->endElement(); //end solidFill
                    $objWriter->startElement('a:prstDash');
                    $objWriter->writeAttribute('val', $minorGridlines->getLineStyleProperty('dash'));
                    $objWriter->endElement();
                    if ($minorGridlines->getLineStyleProperty('join') == 'miter') {
                        $objWriter->startElement('a:miter');
                        $objWriter->writeAttribute('lim', '800000');
                        $objWriter->endElement();
                    } else {
                        $objWriter->startElement('a:bevel');
                        $objWriter->endElement();
                    }
                    if (!is_null($minorGridlines->getLineStyleProperty([
                                                                           'arrow',
                                                                           'head',
                                                                           'type'
                                                                       ]
                    )
                    )
                    ) {
                        $objWriter->startElement('a:headEnd');
                        $objWriter->writeAttribute('type', $minorGridlines->getLineStyleProperty([
                                                                                                     'arrow',
                                                                                                     'head',
                                                                                                     'type'
                                                                                                 ]
                        )
                        );
                        $objWriter->writeAttribute('w', $minorGridlines->getLineStyleArrowParameters('head', 'w'));
                        $objWriter->writeAttribute('len', $minorGridlines->getLineStyleArrowParameters('head', 'len'));
                        $objWriter->endElement();
                    }
                    if (!is_null($minorGridlines->getLineStyleProperty([
                                                                           'arrow',
                                                                           'end',
                                                                           'type'
                                                                       ]
                    )
                    )
                    ) {
                        $objWriter->startElement('a:tailEnd');
                        $objWriter->writeAttribute('type', $minorGridlines->getLineStyleProperty([
                                                                                                     'arrow',
                                                                                                     'end',
                                                                                                     'type'
                                                                                                 ]
                        )
                        );
                        $objWriter->writeAttribute('w', $minorGridlines->getLineStyleArrowParameters('end', 'w'));
                        $objWriter->writeAttribute('len', $minorGridlines->getLineStyleArrowParameters('end', 'len'));
                        $objWriter->endElement();
                    }
                    $objWriter->endElement(); //end ln
                }
                $objWriter->startElement('a:effectLst');
                if (!is_null($minorGridlines->getGlowSize())) {
                    $objWriter->startElement('a:glow');
                    $objWriter->writeAttribute('rad', $minorGridlines->getGlowSize());
                    $objWriter->startElement("a:{$minorGridlines->getGlowColor('type')}");
                    $objWriter->writeAttribute('val', $minorGridlines->getGlowColor('value'));
                    $objWriter->startElement('a:alpha');
                    $objWriter->writeAttribute('val', $minorGridlines->getGlowColor('alpha'));
                    $objWriter->endElement(); //end alpha
                    $objWriter->endElement(); //end schemeClr
                    $objWriter->endElement(); //end glow
                }
                if (!is_null($minorGridlines->getShadowProperty('presets'))) {
                    $objWriter->startElement("a:{$minorGridlines->getShadowProperty('effect')}");
                    if (!is_null($minorGridlines->getShadowProperty('blur'))) {
                        $objWriter->writeAttribute('blurRad', $minorGridlines->getShadowProperty('blur'));
                    }
                    if (!is_null($minorGridlines->getShadowProperty('distance'))) {
                        $objWriter->writeAttribute('dist', $minorGridlines->getShadowProperty('distance'));
                    }
                    if (!is_null($minorGridlines->getShadowProperty('direction'))) {
                        $objWriter->writeAttribute('dir', $minorGridlines->getShadowProperty('direction'));
                    }
                    if (!is_null($minorGridlines->getShadowProperty('algn'))) {
                        $objWriter->writeAttribute('algn', $minorGridlines->getShadowProperty('algn'));
                    }
                    if (!is_null($minorGridlines->getShadowProperty([
                                                                        'size',
                                                                        'sx'
                                                                    ]
                    )
                    )
                    ) {
                        $objWriter->writeAttribute('sx', $minorGridlines->getShadowProperty([
                                                                                                'size',
                                                                                                'sx'
                                                                                            ]
                        )
                        );
                    }
                    if (!is_null($minorGridlines->getShadowProperty([
                                                                        'size',
                                                                        'sy'
                                                                    ]
                    )
                    )
                    ) {
                        $objWriter->writeAttribute('sy', $minorGridlines->getShadowProperty([
                                                                                                'size',
                                                                                                'sy'
                                                                                            ]
                        )
                        );
                    }
                    if (!is_null($minorGridlines->getShadowProperty([
                                                                        'size',
                                                                        'kx'
                                                                    ]
                    )
                    )
                    ) {
                        $objWriter->writeAttribute('kx', $minorGridlines->getShadowProperty([
                                                                                                'size',
                                                                                                'kx'
                                                                                            ]
                        )
                        );
                    }
                    if (!is_null($minorGridlines->getShadowProperty('rotWithShape'))) {
                        $objWriter->writeAttribute('rotWithShape', $minorGridlines->getShadowProperty('rotWithShape'));
                    }
                    $objWriter->startElement("a:{$minorGridlines->getShadowProperty(['color', 'type'])}");
                    $objWriter->writeAttribute('val', $minorGridlines->getShadowProperty([
                                                                                             'color',
                                                                                             'value'
                                                                                         ]
                    )
                    );
                    $objWriter->startElement('a:alpha');
                    $objWriter->writeAttribute('val', $minorGridlines->getShadowProperty([
                                                                                             'color',
                                                                                             'alpha'
                                                                                         ]
                    )
                    );
                    $objWriter->endElement(); //end alpha
                    $objWriter->endElement(); //end color:type
                    $objWriter->endElement(); //end shadow
                }
                if (!is_null($minorGridlines->getSoftEdgesSize())) {
                    $objWriter->startElement('a:softEdge');
                    $objWriter->writeAttribute('rad', $minorGridlines->getSoftEdgesSize());
                    $objWriter->endElement(); //end softEdge
                }
                $objWriter->endElement(); //end effectLst
                $objWriter->endElement(); //end spPr
                $objWriter->endElement(); //end minorGridLines
            }
            if (!is_null($yAxisLabel)) {
                $objWriter->startElement('c:title');
                $objWriter->startElement('c:tx');
                $objWriter->startElement('c:rich');
                $objWriter->startElement('a:bodyPr');
                $objWriter->endElement();
                $objWriter->startElement('a:lstStyle');
                $objWriter->endElement();
                $objWriter->startElement('a:p');
                $objWriter->startElement('a:r');
                $caption = $yAxisLabel->getCaption();
                if (is_array($caption)) {
                    $caption = $caption[0];
                }
                $objWriter->startElement('a:t');
                //                                        $objWriter->writeAttribute('xml:space', 'preserve');
                $objWriter->writeRawData(PHPExcel_Shared_String::ControlCharacterPHP2OOXML($caption));
                $objWriter->endElement();
                $objWriter->endElement();
                $objWriter->endElement();
                $objWriter->endElement();
                $objWriter->endElement();
                if ($groupType !== PHPExcel_Chart_DataSeries::TYPE_BUBBLECHART) {
                    $layout = $yAxisLabel->getLayout();
                    $this->writeLayout($layout, $objWriter);
                }
                $objWriter->startElement('c:overlay');
                $objWriter->writeAttribute('val', 0);
                $objWriter->endElement();
                $objWriter->endElement();
            }
            $objWriter->startElement('c:numFmt');
            $objWriter->writeAttribute('formatCode', $xAxis->getAxisNumberFormat());
            $objWriter->writeAttribute('sourceLinked', $xAxis->getAxisNumberSourceLinked());
            $objWriter->endElement();
            $objWriter->startElement('c:majorTickMark');
            $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('major_tick_mark'));
            $objWriter->endElement();
            $objWriter->startElement('c:minorTickMark');
            $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('minor_tick_mark'));
            $objWriter->endElement();
            $objWriter->startElement('c:tickLblPos');
            $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('axis_labels'));
            $objWriter->endElement();
            $objWriter->startElement('c:spPr');
            if (!is_null($xAxis->getFillProperty('value'))) {
                $objWriter->startElement('a:solidFill');
                $objWriter->startElement("a:" . $xAxis->getFillProperty('type'));
                $objWriter->writeAttribute('val', $xAxis->getFillProperty('value'));
                $objWriter->startElement('a:alpha');
                $objWriter->writeAttribute('val', $xAxis->getFillProperty('alpha'));
                $objWriter->endElement();
                $objWriter->endElement();
                $objWriter->endElement();
            }
            $objWriter->startElement('a:ln');
            $objWriter->writeAttribute('w', $xAxis->getLineStyleProperty('width'));
            $objWriter->writeAttribute('cap', $xAxis->getLineStyleProperty('cap'));
            $objWriter->writeAttribute('cmpd', $xAxis->getLineStyleProperty('compound'));
            if (!is_null($xAxis->getLineProperty('value'))) {
                $objWriter->startElement('a:solidFill');
                $objWriter->startElement("a:" . $xAxis->getLineProperty('type'));
                $objWriter->writeAttribute('val', $xAxis->getLineProperty('value'));
                $objWriter->startElement('a:alpha');
                $objWriter->writeAttribute('val', $xAxis->getLineProperty('alpha'));
                $objWriter->endElement();
                $objWriter->endElement();
                $objWriter->endElement();
            }
            $objWriter->startElement('a:prstDash');
            $objWriter->writeAttribute('val', $xAxis->getLineStyleProperty('dash'));
            $objWriter->endElement();
            if ($xAxis->getLineStyleProperty('join') == 'miter') {
                $objWriter->startElement('a:miter');
                $objWriter->writeAttribute('lim', '800000');
                $objWriter->endElement();
            } else {
                $objWriter->startElement('a:bevel');
                $objWriter->endElement();
            }
            if (!is_null($xAxis->getLineStyleProperty([
                                                          'arrow',
                                                          'head',
                                                          'type'
                                                      ]
            )
            )
            ) {
                $objWriter->startElement('a:headEnd');
                $objWriter->writeAttribute('type', $xAxis->getLineStyleProperty([
                                                                                    'arrow',
                                                                                    'head',
                                                                                    'type'
                                                                                ]
                )
                );
                $objWriter->writeAttribute('w', $xAxis->getLineStyleArrowWidth('head'));
                $objWriter->writeAttribute('len', $xAxis->getLineStyleArrowLength('head'));
                $objWriter->endElement();
            }
            if (!is_null($xAxis->getLineStyleProperty([
                                                          'arrow',
                                                          'end',
                                                          'type'
                                                      ]
            )
            )
            ) {
                $objWriter->startElement('a:tailEnd');
                $objWriter->writeAttribute('type', $xAxis->getLineStyleProperty([
                                                                                    'arrow',
                                                                                    'end',
                                                                                    'type'
                                                                                ]
                )
                );
                $objWriter->writeAttribute('w', $xAxis->getLineStyleArrowWidth('end'));
                $objWriter->writeAttribute('len', $xAxis->getLineStyleArrowLength('end'));
                $objWriter->endElement();
            }
            $objWriter->endElement();
            $objWriter->startElement('a:effectLst');
            if (!is_null($xAxis->getGlowProperty('size'))) {
                $objWriter->startElement('a:glow');
                $objWriter->writeAttribute('rad', $xAxis->getGlowProperty('size'));
                $objWriter->startElement("a:{$xAxis->getGlowProperty(['color','type'])}");
                $objWriter->writeAttribute('val', $xAxis->getGlowProperty([
                                                                              'color',
                                                                              'value'
                                                                          ]
                )
                );
                $objWriter->startElement('a:alpha');
                $objWriter->writeAttribute('val', $xAxis->getGlowProperty([
                                                                              'color',
                                                                              'alpha'
                                                                          ]
                )
                );
                $objWriter->endElement();
                $objWriter->endElement();
                $objWriter->endElement();
            }
            if (!is_null($xAxis->getShadowProperty('presets'))) {
                $objWriter->startElement("a:{$xAxis->getShadowProperty('effect')}");
                if (!is_null($xAxis->getShadowProperty('blur'))) {
                    $objWriter->writeAttribute('blurRad', $xAxis->getShadowProperty('blur'));
                }
                if (!is_null($xAxis->getShadowProperty('distance'))) {
                    $objWriter->writeAttribute('dist', $xAxis->getShadowProperty('distance'));
                }
                if (!is_null($xAxis->getShadowProperty('direction'))) {
                    $objWriter->writeAttribute('dir', $xAxis->getShadowProperty('direction'));
                }
                if (!is_null($xAxis->getShadowProperty('algn'))) {
                    $objWriter->writeAttribute('algn', $xAxis->getShadowProperty('algn'));
                }
                if (!is_null($xAxis->getShadowProperty([
                                                           'size',
                                                           'sx'
                                                       ]
                )
                )
                ) {
                    $objWriter->writeAttribute('sx', $xAxis->getShadowProperty([
                                                                                   'size',
                                                                                   'sx'
                                                                               ]
                    )
                    );
                }
                if (!is_null($xAxis->getShadowProperty([
                                                           'size',
                                                           'sy'
                                                       ]
                )
                )
                ) {
                    $objWriter->writeAttribute('sy', $xAxis->getShadowProperty([
                                                                                   'size',
                                                                                   'sy'
                                                                               ]
                    )
                    );
                }
                if (!is_null($xAxis->getShadowProperty([
                                                           'size',
                                                           'kx'
                                                       ]
                )
                )
                ) {
                    $objWriter->writeAttribute('kx', $xAxis->getShadowProperty([
                                                                                   'size',
                                                                                   'kx'
                                                                               ]
                    )
                    );
                }
                if (!is_null($xAxis->getShadowProperty('rotWithShape'))) {
                    $objWriter->writeAttribute('rotWithShape', $xAxis->getShadowProperty('rotWithShape'));
                }
                $objWriter->startElement("a:{$xAxis->getShadowProperty(['color','type'])}");
                $objWriter->writeAttribute('val', $xAxis->getShadowProperty([
                                                                                'color',
                                                                                'value'
                                                                            ]
                )
                );
                $objWriter->startElement('a:alpha');
                $objWriter->writeAttribute('val', $xAxis->getShadowProperty([
                                                                                'color',
                                                                                'alpha'
                                                                            ]
                )
                );
                $objWriter->endElement();
                $objWriter->endElement();
                $objWriter->endElement();
            }
            if (!is_null($xAxis->getSoftEdgesSize())) {
                $objWriter->startElement('a:softEdge');
                $objWriter->writeAttribute('rad', $xAxis->getSoftEdgesSize());
                $objWriter->endElement();
            }
            $objWriter->endElement(); //effectList
            $objWriter->endElement(); //end spPr
            if ($id1 > 0) {
                $objWriter->startElement('c:crossAx');
                $objWriter->writeAttribute('val', $id2);
                $objWriter->endElement();
                if (!is_null($xAxis->getAxisOptionsProperty('horizontal_crosses_value'))) {
                    $objWriter->startElement('c:crossesAt');
                    $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('horizontal_crosses_value'));
                    $objWriter->endElement();
                } else {
                    $objWriter->startElement('c:crosses');
                    $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('horizontal_crosses'));
                    $objWriter->endElement();
                }
                $objWriter->startElement('c:crossBetween');
                $objWriter->writeAttribute('val', "midCat");
                $objWriter->endElement();
                if (!is_null($xAxis->getAxisOptionsProperty('major_unit'))) {
                    $objWriter->startElement('c:majorUnit');
                    $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('major_unit'));
                    $objWriter->endElement();
                }
                if (!is_null($xAxis->getAxisOptionsProperty('minor_unit'))) {
                    $objWriter->startElement('c:minorUnit');
                    $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('minor_unit'));
                    $objWriter->endElement();
                }
            }
            if ($isMultiLevelSeries) {
                if ($groupType !== PHPExcel_Chart_DataSeries::TYPE_BUBBLECHART) {
                    $objWriter->startElement('c:noMultiLvlLbl');
                    $objWriter->writeAttribute('val', 0);
                    $objWriter->endElement();
                }
            }
            $objWriter->endElement();
        }

        /**
         * Write Category Axis
         * @param  PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param  PHPExcel_Chart_PlotArea   $plotArea
         * @param  PHPExcel_Chart_Title      $xAxisLabel
         * @param  string                    $groupType Chart type
         * @param  string                    $id1
         * @param  string                    $id2
         * @param  boolean                   $isMultiLevelSeries
         * @throws  PHPExcel_Writer_Exception
         */
        private function writeCategoryAxis($objWriter, PHPExcel_Chart_PlotArea $plotArea, $xAxisLabel, $groupType, $id1, $id2, $isMultiLevelSeries, $xAxis, $yAxis) {
            $objWriter->startElement('c:catAx');
            if ($id1 > 0) {
                $objWriter->startElement('c:axId');
                $objWriter->writeAttribute('val', $id1);
                $objWriter->endElement();
            }
            $objWriter->startElement('c:scaling');
            $objWriter->startElement('c:orientation');
            $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('orientation'));
            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->startElement('c:delete');
            $objWriter->writeAttribute('val', 0);
            $objWriter->endElement();
            $objWriter->startElement('c:axPos');
            $objWriter->writeAttribute('val', "b");
            $objWriter->endElement();
            if (!is_null($xAxisLabel)) {
                $objWriter->startElement('c:title');
                $objWriter->startElement('c:tx');
                $objWriter->startElement('c:rich');
                $objWriter->startElement('a:bodyPr');
                $objWriter->endElement();
                $objWriter->startElement('a:lstStyle');
                $objWriter->endElement();
                $objWriter->startElement('a:p');
                $objWriter->startElement('a:r');
                $caption = $xAxisLabel->getCaption();
                if (is_array($caption)) {
                    $caption = $caption[0];
                }
                $objWriter->startElement('a:t');
                //                                        $objWriter->writeAttribute('xml:space', 'preserve');
                $objWriter->writeRawData(PHPExcel_Shared_String::ControlCharacterPHP2OOXML($caption));
                $objWriter->endElement();
                $objWriter->endElement();
                $objWriter->endElement();
                $objWriter->endElement();
                $objWriter->endElement();
                $layout = $xAxisLabel->getLayout();
                $this->writeLayout($layout, $objWriter);
                $objWriter->startElement('c:overlay');
                $objWriter->writeAttribute('val', 0);
                $objWriter->endElement();
                $objWriter->endElement();
            }
            $objWriter->startElement('c:numFmt');
            $objWriter->writeAttribute('formatCode', $yAxis->getAxisNumberFormat());
            $objWriter->writeAttribute('sourceLinked', $yAxis->getAxisNumberSourceLinked());
            $objWriter->endElement();
            $objWriter->startElement('c:majorTickMark');
            $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('major_tick_mark'));
            $objWriter->endElement();
            $objWriter->startElement('c:minorTickMark');
            $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('minor_tick_mark'));
            $objWriter->endElement();
            $objWriter->startElement('c:tickLblPos');
            $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('axis_labels'));
            $objWriter->endElement();
            if ($id2 > 0) {
                $objWriter->startElement('c:crossAx');
                $objWriter->writeAttribute('val', $id2);
                $objWriter->endElement();
                $objWriter->startElement('c:crosses');
                $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('horizontal_crosses'));
                $objWriter->endElement();
            }
            $objWriter->startElement('c:auto');
            $objWriter->writeAttribute('val', 1);
            $objWriter->endElement();
            $objWriter->startElement('c:lblAlgn');
            $objWriter->writeAttribute('val', "ctr");
            $objWriter->endElement();
            $objWriter->startElement('c:lblOffset');
            $objWriter->writeAttribute('val', 100);
            $objWriter->endElement();
            if ($isMultiLevelSeries) {
                $objWriter->startElement('c:noMultiLvlLbl');
                $objWriter->writeAttribute('val', 0);
                $objWriter->endElement();
            }
            $objWriter->endElement();
        }

        /**
         * Write Chart Legend
         * @param  PHPExcel_Chart_Legend     $legend
         * @param  PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @throws  PHPExcel_Writer_Exception
         */
        private function writeLegend(PHPExcel_Chart_Legend $legend = null, $objWriter) {
            if (is_null($legend)) {
                return;
            }
            $objWriter->startElement('c:legend');
            $objWriter->startElement('c:legendPos');
            $objWriter->writeAttribute('val', $legend->getPosition());
            $objWriter->endElement();
            $this->writeLayout($legend->getLayout(), $objWriter);
            $objWriter->startElement('c:overlay');
            $objWriter->writeAttribute('val', ($legend->getOverlay()) ? '1' : '0');
            $objWriter->endElement();
            $objWriter->startElement('c:txPr');
            $objWriter->startElement('a:bodyPr');
            $objWriter->endElement();
            $objWriter->startElement('a:lstStyle');
            $objWriter->endElement();
            $objWriter->startElement('a:p');
            $objWriter->startElement('a:pPr');
            $objWriter->writeAttribute('rtl', 0);
            $objWriter->startElement('a:defRPr');
            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->startElement('a:endParaRPr');
            $objWriter->writeAttribute('lang', "en-US");
            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->endElement();
        }

        /**
         * Write Printer Settings
         * @param  PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @throws  PHPExcel_Writer_Exception
         */
        private function writePrintSettings($objWriter) {
            $objWriter->startElement('c:printSettings');
            $objWriter->startElement('c:headerFooter');
            $objWriter->endElement();
            $objWriter->startElement('c:pageMargins');
            $objWriter->writeAttribute('footer', 0.3);
            $objWriter->writeAttribute('header', 0.3);
            $objWriter->writeAttribute('r', 0.7);
            $objWriter->writeAttribute('l', 0.7);
            $objWriter->writeAttribute('t', 0.75);
            $objWriter->writeAttribute('b', 0.75);
            $objWriter->endElement();
            $objWriter->startElement('c:pageSetup');
            $objWriter->writeAttribute('orientation', "portrait");
            $objWriter->endElement();
            $objWriter->endElement();
        }
    }
